I came across this kind of scenario, I have republished multiple times and it got away, it happen sometimes, and I need to be watchful (for delays in publishing, etc..). During this situation, I was seeing my display settings before publishing, but nothing tracked back to this.

I am using both IE and Chrome. I understand that accessing computer's (follow different settings if connected to projector) resolution will also matter though I understand here you are the person to publish, access and find this flaw.

I use Calibri, but it all depends on your need and overall look and feel of the dashboards. However, you can think of standards and template styles at the level of its usage like external eyes or only internal use or even based on the level of interaction and devices that goes for accessing these dashboards.

Also, note if there is any difference from your display settings 'Automatic', 'Desktop', etc...